flutter国际化支持哪些语言的​

dependencies:   flutter:     sdk: flutter   intl: ^0.17.0

{
  "title": "Hello World",
  "message": "Welcome to Flutter"
}

{   "title": "Hola Mundo",   "message": "Bienvenido a Flutter" }
 

flutter pub run intl_translation:generate_from_arb --output-dir=lib/l10n lib/main.dart lib/l10n/intl_*.arb

import 'package:flutter/material.dart'; import 'package:flutter_localizations/flutter_localizations.dart'; import 'package:intl/intl.dart'; import 'l10n/messages_all.dart'; // 生成的 Dart 文件  void main() {   runApp(MyApp()); }  class MyApp extends StatelessWidget {   @override   Widget build(BuildContext context) {     return MaterialApp(       localizationsDelegates: [         GlobalMaterialLocalizations.delegate,         GlobalWidgetsLocalizations.delegate,         GlobalCupertinoLocalizations.delegate,         // 添加自定义的本地化委托         AppLocalizations.delegate,       ],       supportedLocales: [         const Locale('en', ''), // English         const Locale('es', ''), // Spanish         // 添加更多的语言支持       ],       home: MyHomePage(),     );   } }  class MyHomePage extends StatelessWidget {   @override   Widget build(BuildContext context) {     return Scaffold(       appBar: AppBar(         title: Text(AppLocalizations.of(context).title),       ),       body: Center(         child: Text(AppLocalizations.of(context).message),       ),     );   } }
 

import 'package:flutter/material.dart'; import 'package:intl/intl.dart'; import 'l10n/messages_all.dart'; // 生成的 Dart 文件  class AppLocalizations {   static Future<AppLocalizations> load(Locale locale) {     final String name = locale.countryCode.isEmpty ? locale.languageCode : locale.toString();     final String localeName = Intl.canonicalizedLocale(name);      return initializeMessages(localeName).then((_) {       Intl.defaultLocale = localeName;       return AppLocalizations();     });   }    static AppLocalizations of(BuildContext context) {     return Localizations.of<AppLocalizations>(context, AppLocalizations);   }    String get title {     return Intl.message(       'Hello World',       name: 'title',       desc: 'Title for the application',     );   }    String get message {     return Intl.message(       'Welcome to Flutter',       name: 'message',       desc: 'Welcome message for the application',     );   } }  class AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations> {   const AppLocalizationsDelegate();    @override   bool isSupported(Locale locale) {     return ['en', 'es'].contains(locale.languageCode);   }    @override   Future<AppLocalizations> load(Locale locale) {     return AppLocalizations.load(locale);   }    @override   bool shouldReload(AppLocalizationsDelegate old) => false; }